A firetruck pulls up next to a burning building that is 25 ft away the ladder operator extends the ladder at a 35 degree angle h
ow long is the ladder when it reaches the building
1 answer:
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When we need the cosine of the sum of two angles, we use the addition formula for cosine.
When we need the sine of the difference of two angles, we use the difference formula for sine.
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so
When we need the sine of the difference of two angles, we use the difference formula for sine.
Let's try one. Say we needed to know
We're only expected to know the trig functions of 30/60/90 and 45/45/90 triangles. Fortunately,