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german
4 years ago
9

Which statement is false?

Mathematics
2 answers:
Sidana [21]4 years ago
8 0

Trigonometric functions which are related by having the same value at complementary angles are called cofunctions. Cofunctions of complementary angles are equal.

A. csc 20' = csc(90-70)=sec 70

B. cos 87' =  cos (90-3)=sin 3'

C. csc 40' =  csc(90-50) =sec50'  


D. tan 15' = tan(90-75)= cot 75'

Among all the option  c is not correct.

Option C is false.




arlik [135]4 years ago
5 0
Answer: Option <span>C. csc 40' = sin 50'
Because csc and sin are not cofunctions</span>
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