0 like 0 dislike

Simplify the trigonometric expression without using a calculator:

$$\cos^{2}{(180^{\circ} + x)}[\tan{(360^{\circ} - x)}.\cos{(90^{\circ} +x)} + \sin{(x - 90^{\circ}}).\cos{180}]$$

in Grade 12 Maths by Bronze Status (8.4k points) | 218 views

1 Answer

0 like 0 dislike
instead of using compound angles given, use reduction formulas and sin-cos complementary/supplementary angles:


= -cosx^2(sinx/cosx X -sinx^2-1)

= cosxsinx^3 - 1
by Silver Status (28.5k points)

Related questions

0 like 0 dislike
1 answer
0 like 0 dislike
2 answers
asked Oct 17, 2019 in Grade 12 Maths by TEDSF Diamond (37.9k points) | 35 views
Welcome to MathsGee Open Question and Answer Bank, a platform, where you can ask Maths and Science questions and receive answers from other members of the community. Help is always 100% FREE!
MathsGee QnA is the knowledge-sharing community where millions of students and experts put their heads together to crack their toughest homework questions.

Enter your email address: