Answer: sec^4(x)-tan^4(x) = 1+2 x tan^2(x)
Step-by-step explanation:
Answer: 0.4
Step-by-step explanation: To find 20% of 2, first write 20% as a decimal by moving the decimal point two places to the left to get .20.
Next, the word "of" tells us to multiply so we multiply .20 by 2.
(.20) (2) = 0.4
Therefore, 0.4 is 20% of 40.
ANSWER






EXPLANATION
From the Pythagoras Theorem, the hypotenuse can be found.




The sine ratio is negative in the fourth quadrant.


The cosecant ratio is the reciprocal of the sine ratio.

The cosine ratio is positive in the fourth quadrant.


The secant ratio is the reciprocal of the cosine ratio.

The tangent ratio is negative in the fourth quadrant.


The reciprocal of the tangent ratio is the cotangent ratio
