Math, asked by kumarkrishan63905, 8 months ago

01. Evaluate cos 70° cos 10° + sin 70° sin 10°

Answers

Answered by Anonymous

1

L.H.S.=cos700cos100+sin700sin100 =cos(700−100) (Using the formula, cosAcosB+sinAsinB=cos(A−B)) =cos600 =12 =R.H.S.Hence Proved.

Step-by-step explanation:

hope it helped you friend if it helps you mark it as brainliest

Previous Question

Next Question

Similar questions

Math, 4 months ago

Let x and y be real numbers satisfying the inequality 5x² + y² - 4xy + 24 ≤ 10x - 1. Find the value of x² + y² - 29.

Math, 4 months ago

Which of the following number is composite? (a) 23 (b) 42 (c) 29 (d) 59 ...

Math, 4 months ago

simplify (2x-1)²-(x-1)²...

Math, 8 months ago

a boat whose speed is 12 km/h in still water takes 1 hour less to go 15 km downstream than to return upstream to the same spot. Find the speed of the stream.

Math, 8 months ago

name the property of rational number 5+(-1)=(-1)+5=4...

Chemistry, 1 year ago

Describe an expirement to show that gases do not have fixed shape or volume...

Math, 1 year ago

Ranu wants to lay tiles on the floor of her house which is 9m long and 7m wide. among the following sizes of tiles, which one should she buy so that the floor is tiled without cutting any tile?

Hindi, 1 year ago

deshbhakto ke yogdan Sanskrit mein...