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Chapter 8: Q. 22 (page 517)

Find the exact value of the expression-

cos40掳sin50掳

Short Answer

Expert verified

The required value is,

cos40掳sin50掳=1

Step by step solution

01

Step 1. Given information

Given expression

cos40掳sin50掳

02

Step 2. Calculation

Solving the given expression,

cos40掳sin50掳=cos(90掳-50掳)sin50掳=sin50掳sin50掳=1 ----------(complementary angle,cos(90掳-胃)=sin胃)

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Most popular questions from this chapter

an object attached to a coiled spring is pulled down a distance a from its rest position and then released. Assuming that the motion is simple harmonic with period T, write an equation that relates the displacement d of the object from its rest position after t seconds. Also assume that the positive direction of the motion is up:

a=6,T=蟺seconds

A 22-foot extension ladder leaning against a building makes a 70掳 angle with the ground. How far up the building does the ladder touch?

Find the area of the triangle. Round answer to two decimal places.

A=50掳,C=20掳,a=3

Find an equation for the circle with center at the point (-5,1)and radius 3. Graph this circle.

Solve each triangle.

a=9,b=7,c=10
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