Hello my name is Jeff (sorry)
Answer:
c
Step-by-step explanation:
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.
Which number is the under lined digit?
Use the Order of Operations.
1/2(14)(5)
1/2(70)
35
The answer is: 35
